1. Functional Nano-Materials (FuN) Laboratory, Department of Physics and Nanotechnology, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, TN, 603203, India
2. Department of Medical Physics, Anna University, Chennai, TN, 600025, India
3. National Centre for Nanoscience and Nanotechnology, University of Madras, Chennai, TN, 600025, India